US7948740B2 - Solid electrolytic capacitor and method of manufacturing the same - Google Patents
Solid electrolytic capacitor and method of manufacturing the same Download PDFInfo
- Publication number
- US7948740B2 US7948740B2 US12/051,519 US5151908A US7948740B2 US 7948740 B2 US7948740 B2 US 7948740B2 US 5151908 A US5151908 A US 5151908A US 7948740 B2 US7948740 B2 US 7948740B2
- Authority
- US
- United States
- Prior art keywords
- separator
- fiber
- foil
- natural fiber
- anode foil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
- H01G9/151—Solid electrolytic capacitors with wound foil electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
- H01G9/0036—Formation of the solid electrolyte layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/02—Diaphragms; Separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/43—Electric condenser making
- Y10T29/435—Solid dielectric type
Definitions
- the present invention relates to a solid electrolytic capacitor and a method of manufacturing the solid electrolytic capacitor.
- solder including no lead is being used in a reflow process in consideration of environmental problem.
- the solder has a melting point higher than that of a solder including lead. It is therefore necessary to increase temperature of the reflow compared to that of conventional reflow. This may result in increase of thermal stress applied to a solid electrolytic capacitor, swelling of the capacitor, and degradation of the capacitor.
- Japanese Patent Application Publication No. 11-204377 discloses an art where a polymerized element is protected by a thermoset resin, in order to restrain the swelling.
- Document 1 discloses an art where a polymerized element is protected by a thermoset resin, in order to restrain the swelling.
- Document 2 discloses an art where an element is subjected to a thermal treatment of 200 degrees C. to 300 degrees C. before being housed in a case.
- Document 3 discloses an art where an element in which a vinylon separator is included with a silver coated lead line is subjected to a thermal treatment of 175 degrees C. to 300 degrees C. before monomer oxidizer is impregnated into the element.
- Document 4 discloses an art where ferric p-toluene sulfonate solution is impregnated into an element having a vinylon separator and the element is subjected to a thermal treatment of 150 degrees C. to 200 degrees C.
- the polymerized element is subjected to a stress because of hardening of the thermoset resin in a case where the thermoset resin protects the polymerized element, with the art disclosed in Document 1.
- An anode oxide coating is subjected to a thermal stress because of the treatment, with the art disclosed in Document 2.
- the silver coating is sulfurized into a silver sulfide because of sulfidizing gas generated during chemical polymerization of monomer and oxidizer, with the art disclosed in Document 3.
- vinylon fiber used for the vinylon separator is not generally used.
- a separator made of only vinylon fiber is expensive and has a high density. It is difficult to provide an inexpensive capacitor having high ESR, with the art disclosed in Document 4.
- a thermal degradation may be used in order to restrain swelling caused by the reflow, because oxidizer degrades natural fiber after the polymerization of monomer.
- the anode oxide coating may be degraded because of thermal stress, and the leaking current may be increased.
- a method using synthesized fiber separator may be used in order to restrain swelling caused by reflow heat.
- the synthesized fiber separator is not generally used and is expensive. It is therefore difficult to provide an inexpensive capacitor. And it is difficult to reduce the density of the synthesized separator compared to a natural fiber separator. Therefore, the ESR may be degraded, compared to a case where the natural fiber separator is used.
- strength of the separator may not be sufficient. In this case, the separator may be broken during rolling.
- the present invention has been made in view of the above circumstances, and provides a method of manufacturing a solid electrolytic capacitor in which breaking of a separator during rolling is restrained and swelling caused by a reflow heat is restrained. And the present invention provides a solid electrolytic capacitor in which swelling caused by reflow heat is restrained.
- a method of manufacturing a solid electrolytic capacitor including: rolling an anode foil, a cathode foil and a separator together, the separator being a mixed fiber composed of a chemical fiber and a natural fiber and being between the anode foil and the cathode foil; degrading and removing the natural fiber with enzyme; and forming an electrolytic layer composed of solid polymer between the anode foil and the cathode foil after degrading and removing the natural fiber.
- the separator has a given strength, because the separator includes the natural fiber during the rolling of the anode foil and the cathode foil. Therefore, breaking of the separator may be restrained during the rolling. Density of the separator is reduced after the natural fiber is removed from the separator. Filling density of the electrolytic layer is increased between the anode foil and the cathode foil. And the electrolytic layer is stabilized. Consequently, ESR of the solid electrolytic capacitor may be reduced. And a reaction between oxidizer and the natural fiber may be restrained during a heating process. Therefore, swelling may be restrained.
- a solid electrolytic capacitor including an anode foil, a cathode foil, a separator; and an electrolytic layer.
- the anode foil, the cathode foil and the separator are rolled together.
- the separator is between the anode foil and the cathode foil.
- the electrolytic layer is between the anode foil and the cathode foil.
- the separator is composed of chemical fiber. And a density of the chemical fiber is less than 0.2 g/cm 3 .
- FIG. 1A through FIG. 1D illustrate a method of manufacturing a solid electrolytic capacitor in accordance with a first embodiment
- FIG. 2A through FIG. 2E illustrate the method of manufacturing the solid electrolytic capacitor in accordance with the first embodiment
- FIG. 3A and FIG. 3B illustrate the method of manufacturing the solid electrolytic capacitor in accordance with the first embodiment
- FIG. 4A and FIG. 4B illustrate the solid electrolytic capacitor in accordance with the first embodiment.
- FIG. 1A through 3B illustrate a method of manufacturing a solid electrolytic capacitor in accordance with a first embodiment.
- an anode foil 10 and a cathode foil 20 are provided.
- the anode foil 10 is made of a valve metal having a dielectric oxide coating (not illustrated) formed on a surface thereof.
- the valve metal used for the anode foil 10 is a metal such as aluminum.
- the dielectric coating may be formed when a surface of the valve metal is subjected to an etching treatment and a chemical oxidizing treatment.
- the cathode foil 20 is made of a metal foil such as aluminum holding carbide grain (not illustrated) on a surface thereof.
- the anode foil 10 and the cathode foil 20 are substantially isometric to each other.
- an anode terminal 11 is jointed to the anode foil 10 .
- a cathode terminal 21 is jointed to the cathode foil 20 .
- the anode foil 10 , the cathode foil 20 and a separator 30 are rolled together, the separator being between the anode foil 10 and the cathode foil 20 . This results in a rolled element 100 .
- the separator 30 is composed of a mixed fiber in which chemical fiber and natural fiber are mixed. The chemical fiber used as the separator 30 is not limited.
- the chemical fiber has a relatively small fiber diameter and a shape of the chemical fiber is maintained even if the chemical fiber is subjected to a high temperature of approximately 250 degrees C. It is therefore preferable that the chemical fiber is a synthetic fiber such as polyamide, acrylic, vinylon, polyester, polyimide, aramid, or nylon.
- the natural fiber used as the separator 30 is not limited. It is, however, preferable that the natural fiber is swellable. It is therefore preferable that the natural fiber is plant fiber such as manila fiber, kraft pulp, hemp fiber, or cotton. These natural fibers are composed of fiber subjected to a refining treatment.
- the anode terminal 11 and the cathode terminal 21 are inserted into a through hole of a sealing member 40 .
- the sealing member 40 is made of an elastic material such as rubber.
- the anode foil 10 , the cathode foil 20 and the separator 30 are immersed in enzyme solution 50 that includes enzyme degrading natural fiber.
- the natural fiber is selectively degraded from the separator 30 .
- the above-mentioned enzyme is an enzyme degrading natural fiber selectively.
- the enzyme is such as cellulose-degrading enzyme like cellulase, or hemicellulose-degrading enzyme.
- the enzyme solution 50 may be a solution in which the enzyme is solved into pure water. It is preferable that enzyme concentration of the enzyme solution 50 , temperature of the enzyme solution 50 and time for which the separator 30 is immersed in the enzyme solution 50 are adequately set, in order to degrade the natural fiber of the separator 30 effectively. It is, for example, preferable that the enzyme concentration of the enzyme solution 50 is 0.1 weight % to 50 weight %.
- the temperature of the enzyme solution 50 is preferably 5 degrees C. to 70 degrees C., and is more preferably 20 degrees C. to 60 degrees C. And it is preferable that the time for which the separator 30 is immersed in the enzyme solution 50 is more than one hour.
- the degraded natural fiber may be removed with an ultra sonic cleaning treatment with pure water or the like. The method of removing the natural fiber is not limited.
- the anode foil 10 is electrically energized in electrolytic solution and is subjected to a chemical conversion treatment.
- Solute used as the electrolytic solution may be organic acid salt having carboxylic acid function, inorganic acid salt such as phosphoric acid, or the like.
- the electrolytic solution is adipic acid ammonium.
- This chemical conversion treatment uses chemical conversion solution having an adipic acid ammonium concentration of 0.5 weight % to 2 weight %, and is performed with voltage near a formation voltage of the dielectric oxide coating. After that, a thermal treatment is performed. And the chemical conversion treatment is repeated several times. Thus, secure dielectric oxide coating is formed.
- the thermal treatment is performed for a few minutes to a few tens minutes in a temperature range of 200 degrees C. to 320 degrees C.
- This chemical conversion treatment forms an oxide coating on the valve metal exposed on an end face (edge portion) of the anode foil 10 and on a metal face damaged and exposed during the connection of the terminal.
- the separator 30 is immersed in monomer solution in which polymerizable monomer is diluted with diluent solvent. And the monomer solution is heated.
- the polymerizable monomer may be 3,4-ethylenedioxythiophene or the like.
- the diluent solvent may be volatile solvent. Concentration of the polymerizable monomer is preferably 5 weight % to 50 weight %, and is more preferably 15 weight % to 30 weight %.
- the method of impregnation of the monomer solution may be a decompression impregnation, a vacuum-compression impregnation or the like other than the immersion impregnation shown in FIG. 2C . After that, the volatile solvent is dried and removed by heating the monomer solution.
- the volatile solvent may be an organic solvent having more than one carbon number, and may be carbon hydride such as pentane, ether such as tetrahydrofuran, ester such as ethyl formate, ketone such as acetone, alcohol such as methanol, nitrogen compound such as acetonitrile, mixed solution of these, or the like.
- carbon hydride such as pentane
- ether such as tetrahydrofuran
- ester such as ethyl formate
- ketone such as acetone
- alcohol such as methanol
- nitrogen compound such as acetonitrile, mixed solution of these, or the like.
- methanol, ethanol, acetone or the like are preferable.
- the time for which the monomer solution is impregnated into the separator 30 in the process shown in FIG. 2C is optimized. This is because the monomer solution may not be sufficiently impregnated into the separator 30 when the impregnation time is short, and more than a given amount of the monomer may not be impregnated into the separator 30 even if the impregnation time is long. In the embodiment, it is preferable that the time for which the monomer solution is impregnated into the separator 30 is 30 seconds to 2 minutes. It is preferable that the temperature of the monomer solution is optimized.
- the temperature of the monomer solution is 20 degrees C. to 60 degrees C.
- an oxidizer is impregnated into the separator 30 , in this case, the oxidizer may be impregnated into the separator 30 effectively, because a void is formed at a position where the volatile solvent is vaporized.
- the oxidizer may be ferric p-toluene sulfonate, ferric dodecylbenzenesulfonate, ferric methoxybenzenesulfonate or the like.
- Solvent of the oxidizer may be proton solvent such as alcohol solvent like butanol or ethanol, or may be non-proton solvent.
- the method of the impregnation of the oxidizer may be a decompression impregnation, a vacuum-compression impregnation, an atmosphere pressure immersion impregnation method.
- FIG. 2E illustrates a cross sectional view of the anode foil 10 , the cathode foil 20 , the separator 30 and the electrolytic layer 60 .
- the electrolytic layer 60 is composed of polyethylenedioxythiophene if the polymerizable monomer is 3,4-ethylenedioxythiophene. In this case, the polymerization is promoted if the polymerizable monomer is heated. It is, however, preferable that the polymerizable monomer is heated not rapidly but gradually. This is because the electrolytic layer 60 may be formed evenly.
- the capacitor element 200 is housed in a metal case 70 . Then, the sealing member 40 is pushed into an opening of the metal case 70 . After that, the capacitor element 200 is subjected to an aging treatment in which normal-rated voltage is applied to the capacitor element 200 at approximately 150 degrees C. Defective portion of the anode foil 10 and defective portion of the cathode foil 20 are insulated from each other. A solid electrolytic capacitor 300 is fabricated. It is preferable that the temperature in the aging treatment is 105 degrees C. to 180 degrees C. This is because effect of the aging treatment may not be obtained at temperature less than 105 degrees C., and ESR characteristics may be degraded at temperature more than 180 degrees C.
- FIG. 4A illustrates an external view of the solid electrolytic capacitor 300 subjected to the aging treatment.
- a surface mountable solid electrolytic capacitor 300 a illustrated in FIG. 4B is fabricated with following processes of adhering a board 80 to the sealing member 40 side of the solid electrolytic capacitor 300 , penetrating the anode terminal 11 and the cathode terminal 21 through the board 80 , and bending the anode terminal 11 and the cathode terminal 21 at a bottom of the through hole of the board 80 by 90 degrees.
- the separator 30 has a given strength because the separator 30 includes the natural fiber during the rolling of the anode foil 10 and the cathode foil 20 . It is therefore possible to restrain breaking of the separator 30 .
- the density of the separator 30 is reduced when the natural fiber is removed from the separator 30 . And, filling density of the electrolytic layer 60 is increased between the anode foil 10 and the cathode foil 20 , and the electrolytic layer 60 is stabilized. The ESR of the solid electrolytic capacitors 300 and 300 a is therefore reduced. It is preferable that the separator 30 is mainly made of the natural fiber, because the filling density of the electrolytic layer 60 is sufficiently increased.
- “mainly made of the natural fiber” means that a weight ratio of the natural fiber against the chemical fiber is more than 1.
- swelling may be occurred, when the natural fiber reacts with the oxidizer in a heating process such ash reflow. It is, however, possible to restrain the swelling in the heating process because the natural fiber is removed in the embodiment.
- the density of the separator 30 of which natural fiber is removed is preferably less than 0.2 g/cm 3 , and is more preferably less than 0.15 g/cm 3 . This is because the filling density of the electrolytic layer 60 is sufficiently large.
- the density of the separator 30 of which natural fiber is removed may be 0.2 g/cm 3 when a weight ratio of the chemical fiber and the natural fiber is 3:2, in a case where hemp fiber is used as the natural fiber and polyamide-based resin is used as the chemical fiber.
- the density of the separator 30 of which natural fiber is removed may be 0.15 g/cm 3 when a weight ratio of the chemical fiber and the natural fiber is 1:1.
- a lower limit of the density of the separator 30 of which natural fiber is removed is not limited if the anode foil 10 and the cathode foil 20 is not electrically conducted.
- the chemical conversion treatment may be performed before degrading and removing the natural fiber, although the chemical conversion treatment is performed after degrading and removing the natural fiber, in the embodiment. However, in a case where the natural fiber is rested, the rested fiber may be removed, if the chemical conversion treatment is performed after degrading and removing the natural fiber. In this case, the ESR characteristics may be improved more. It is therefore preferable that the chemical conversion treatment is performed after degrading and removing the natural fiber.
- the oxidizer is impregnated into the separator 30 after the monomer is impregnated into the separator 30 , in the embodiment.
- the monomer may be impregnated into the separator 30 after the oxidizer is impregnated into the separator 30 .
- a mixed liquid in which the monomer and the oxidizer are mixed may be impregnated into the separator 30 .
- the solid electrolytic capacitor 300 and the solid electrolytic capacitor 300 a were fabricated.
- the solid electrolytic capacitor 300 shown in FIG. 4A was fabricated in a first example.
- the anode foil 10 was formed of an aluminum foil that was subjected to an etching treatment and a chemical conversion treatment and had a width of 2.7 mm.
- the cathode foil 20 was formed of an aluminum that had a width of 2.7 mm and held the carbon grains on the surface of the cathode foil 20 .
- the anode foil 10 , the cathode foil 20 and the separator 30 were rolled together, the separator 30 being between the anode foil 10 and the cathode foil 20 .
- the separator 30 is a mixed fiber in which hemp fiber and polyamide resin are mixed in a weight ratio of 1:1.
- Cellulose-degrading enzyme made by Amano Enzyme Inc. was used as the enzyme for degrading the natural fiber.
- the enzyme was solved in pure water. And water solution having 1.0 weight % was formed.
- the rolled element 100 had been immersed in the water solution for 12 hours in a temperature-controlled bath having temperature of 50 degrees C. After that, the degraded fiber was removed with an ultra sonic cleaning method using pure water.
- the density of the separator 30 of which natural fiber is removed was 0.15 g/cm 3 .
- the rolled element 100 was immersed in a chemical conversion liquid. A voltage near the formation voltage of the dielectric coating of the anode foil 10 was applied to the anode foil 10 for 10 minutes.
- the chemical conversion liquid included 2 weight % of adipidic acid ammonium salt. After that, the chemical conversion liquid was removed from the rolled element 100 in the pure water. The rolled element 100 was subjected to a thermal treatment of 200 degrees C. to 270 degrees C. for 10 minutes.
- the rolled element 100 was immersed in a monomer solution for one minute in which monomer concentration solution of 3,4-ethylenedioxythiophene is diluted with diluent solution made of ethanol.
- the concentration of the monomer in the monomer solution was 25 weight %.
- the ethanol was dried and removed at temperature of 50 degrees C.
- butanol solution including 55 weight % of ferric p-toluene sulfonate was impregnated into the rolled element 100 .
- the rolled element 100 was heated from 30 degrees C. to 180 degrees C. in stages.
- the electrolytic layer 60 composed of polyethylenedioxythiophene was made between the anode foil 10 and the cathode foil 20 .
- the rolled element 100 was housed in the metal case 70 made of aluminum.
- the opening of the metal case 70 was sealed with the sealing member 40 made of rubber.
- the rolled element 100 was subjected to the aging treatment at temperature of 150 degrees C. in which the normal-rated voltage was applied to the rolled element 100 .
- the capacitance of the solid electrolytic capacitor 300 in accordance with the first example was 2.5V560 ⁇ F, had a diameter of 6.3 mm, and had a length of 5.7 mm.
- the board 80 was adhered to the sealing member 40 side of the solid electrolytic capacitor 300 fabricated in the first example.
- the anode terminal 11 and the cathode terminal 21 were penetrated through the board 80 .
- the anode terminal 11 and the cathode terminal 21 were bended at the bottom of the through hole of the board 80 by 90 degrees. A part of the anode terminal 11 and a part of the cathode terminal 21 getting out of the board 80 were cut off.
- the solid electrolytic capacitor 300 a shown in FIG. 4B in accordance with the second embodiment was fabricated.
- Another solid electrolytic capacitor that is same as that in accordance with the first example was fabricated in a comparative example. However, the degradation and the removal of the natural fiber using the enzyme were omitted.
- Another solid electrolytic capacitor that is same as that in accordance with the second example was fabricated in a second comparative example. However, the degradation and the removal of the natural fiber using the enzyme were omitted.
- the solid electrolytic capacitors of the first example, the second example, the first comparative example and the second comparative example were measured with respect to initial electrical characteristics. Table 1 shows respective values. Thirty solid electrolytic capacitors in accordance with the first example, the second example, the first comparative example and the second comparative example were respectively fabricated, and each value in Table 1 shows average value thereof.
- the ESR of the solid electrolytic capacitors in accordance with the first example and the second example were lower than those of the solid electrolytic capacitors in accordance with the first comparative example and the second comparative example. It is thought this is because the filling density of the electrolytic layer 60 was increased because of reduction of the density of the separator 30 .
- the solid electrolytic capacitor in accordance with the second example and the second comparative example were measured with respect to electrical characteristics after the reflow and an external view thereof.
- Hot air reflow was performed. In the hot air reflow, the temperature was kept 180 degrees C. to 200 degrees C. for 120 seconds and was kept more than 200 degrees C. for 120 seconds. The maximum temperature was 260 degrees C.
- the solid electrolytic capacitors were subjected to the hot air reflow twice. Table 2 shows respective value. Table 2 shows average value of thirty solid electrolytic capacitors in accordance with each of the examples. Table 3 shows existence and nonexistence of abnormality of external view. Table 3 shows the number of the samples having abnormality with fractional number.
- the ESR of the solid electrolytic capacitor in accordance with the second comparative example was increased after the reflow. In contrast, the ESR of the solid electrolytic capacitor in accordance with the second example was increased little after the reflow. Abnormality of external view caused by swelling was observed after the reflow on the solid electrolytic capacitor in accordance with the second comparative example. In contrast, no abnormality of external view was observed after the reflow on the solid electrolytic capacitor in accordance with the second example.
Abstract
Description
TABLE 1 | |||||
Electrical | |||||
capacitance | ESR | Leakage current | |||
(μF) | tanδ | (mΩ) | (μA) | ||
First Example | 562.0 | 0.018 | 8.6 | 78 |
Second Example | 565.4 | 0.018 | 8.8 | 86 |
First Comparative | 550.5 | 0.022 | 10.5 | 130 |
Example | ||||
Second | 551.3 | 0.023 | 10.7 | 142 |
Comparative | ||||
Example | ||||
TABLE 2 | |||||
Electrical | |||||
capacitance | ESR | Leakage current | |||
(μF) | tanδ | (mΩ) | (μA) | ||
Second Example | 562.4 | 0.019 | 9.0 | 113 |
Second | 546.6 | 0.028 | 12.5 | 196 |
Comparative | ||||
Example | ||||
TABLE 3 | ||
Swelling of Case or Rubber | ||
Second Example | 0/30 | ||
Second Comparative Example | 28/30 | ||
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007070289A JP4448865B2 (en) | 2007-03-19 | 2007-03-19 | Manufacturing method of solid electrolytic capacitor |
JP2007-070289 | 2007-03-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20080232034A1 US20080232034A1 (en) | 2008-09-25 |
US7948740B2 true US7948740B2 (en) | 2011-05-24 |
Family
ID=39774443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/051,519 Expired - Fee Related US7948740B2 (en) | 2007-03-19 | 2008-03-19 | Solid electrolytic capacitor and method of manufacturing the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US7948740B2 (en) |
JP (1) | JP4448865B2 (en) |
KR (1) | KR100965043B1 (en) |
CN (1) | CN101271779B (en) |
TW (1) | TWI410990B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120250223A1 (en) * | 2009-07-30 | 2012-10-04 | Medtronic, Inc. | Method for joining dissimular separator materials |
US20120250226A1 (en) * | 2010-08-20 | 2012-10-04 | Panasonic Corporation | Sealing member for capacitor and aluminum electrolytic capacitor using the same |
US20130258554A1 (en) * | 2010-03-16 | 2013-10-03 | Shin-Etsu Polymer Co., Ltd. | Solid electrolytic capacitor, method for producing the same and solution for solid electrolytic capacitor |
US9875851B2 (en) | 2012-05-08 | 2018-01-23 | Epcos Ag | Ceramic multi-layered capacitor |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4913699B2 (en) * | 2007-09-29 | 2012-04-11 | ニチコン株式会社 | Electrolytic capacitor |
CN102354619B (en) * | 2011-09-14 | 2016-08-17 | 中国第一汽车股份有限公司 | A kind of flexible solid-state supercapacitor |
CN102360950B (en) * | 2011-09-14 | 2017-03-15 | 中国第一汽车股份有限公司 | A kind of barrier film for flexible solid-state supercapacitor and preparation method thereof |
CN109326448B (en) * | 2018-10-12 | 2021-01-19 | 福建国光电子科技有限公司 | Method for producing solid electrolytic capacitor |
CN113178331B (en) * | 2020-01-08 | 2022-12-09 | 南通江海电容器股份有限公司 | Low-leakage-current solid-liquid mixed electrolytic capacitor |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09213573A (en) | 1996-01-30 | 1997-08-15 | Daifuku Seishi Kk | Electrolytic paper for aluminum electrolytic capacitor |
JPH11204377A (en) | 1998-01-08 | 1999-07-30 | Sanyo Electric Co Ltd | Solid-state electrolytic capacitor |
CN1225495A (en) | 1998-01-28 | 1999-08-11 | 松下电器产业株式会社 | Electrolytic capacitor and method for making same |
JP2000058389A (en) | 1998-08-04 | 2000-02-25 | Sanyo Electric Co Ltd | Manufacture of solid electrolytic capacitor |
JP2001284179A (en) | 2000-03-29 | 2001-10-12 | Nippon Chemicon Corp | Solid electrolytic capacitor and method of manufacturing the same |
JP2002110466A (en) | 2000-09-29 | 2002-04-12 | Nippon Chemicon Corp | Solid-state electrolytic capacitor and method of manufacturing the same |
JP2004193402A (en) | 2002-12-12 | 2004-07-08 | Du Pont Teijin Advanced Paper Kk | Solid electrolytic capacitor |
US6765785B2 (en) * | 2001-06-01 | 2004-07-20 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte composite for driving an electrolytic capacitor, an electrolytic capacitor using the same, and a method of making the electrolytic capacitor |
US6771488B2 (en) * | 2001-10-26 | 2004-08-03 | Matsushita Electric Industrial Co., Ltd. | Solid electrolytic capacitor and method of manufacturing the capacitor |
US6839222B2 (en) * | 2002-12-06 | 2005-01-04 | Matsushita Electric Industrial Co., Ltd. | Electrolytic capacitor |
US6853537B2 (en) * | 2003-03-20 | 2005-02-08 | Jelmax Company, Ltd. | Electrolytic capacitor and a fuel cell drive car using the capacitor |
CN1702788A (en) | 2005-07-05 | 2005-11-30 | 万裕三信电子(东莞)有限公司 | Solid electrolytic capacitor and method for manufacturing the same |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100241707B1 (en) | 1996-08-31 | 2000-02-01 | 김영정 | Varistor and method for manufacturing the same |
CN1773640B (en) * | 2005-09-06 | 2010-05-12 | 万裕三信电子(东莞)有限公司 | Solid electrolytic capacitor and producing method thereof |
-
2007
- 2007-03-19 JP JP2007070289A patent/JP4448865B2/en not_active Expired - Fee Related
-
2008
- 2008-03-06 KR KR1020080020828A patent/KR100965043B1/en active IP Right Grant
- 2008-03-18 TW TW097109455A patent/TWI410990B/en not_active IP Right Cessation
- 2008-03-19 US US12/051,519 patent/US7948740B2/en not_active Expired - Fee Related
- 2008-03-19 CN CN2008100868485A patent/CN101271779B/en not_active Expired - Fee Related
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09213573A (en) | 1996-01-30 | 1997-08-15 | Daifuku Seishi Kk | Electrolytic paper for aluminum electrolytic capacitor |
JPH11204377A (en) | 1998-01-08 | 1999-07-30 | Sanyo Electric Co Ltd | Solid-state electrolytic capacitor |
CN1225495A (en) | 1998-01-28 | 1999-08-11 | 松下电器产业株式会社 | Electrolytic capacitor and method for making same |
US6962612B1 (en) * | 1998-01-28 | 2005-11-08 | Matsushita Electric Industrial Co., Ltd. | Electrolytic capacitor and its manufacturing method |
JP2000058389A (en) | 1998-08-04 | 2000-02-25 | Sanyo Electric Co Ltd | Manufacture of solid electrolytic capacitor |
JP2001284179A (en) | 2000-03-29 | 2001-10-12 | Nippon Chemicon Corp | Solid electrolytic capacitor and method of manufacturing the same |
JP2002110466A (en) | 2000-09-29 | 2002-04-12 | Nippon Chemicon Corp | Solid-state electrolytic capacitor and method of manufacturing the same |
US6765785B2 (en) * | 2001-06-01 | 2004-07-20 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte composite for driving an electrolytic capacitor, an electrolytic capacitor using the same, and a method of making the electrolytic capacitor |
US6771488B2 (en) * | 2001-10-26 | 2004-08-03 | Matsushita Electric Industrial Co., Ltd. | Solid electrolytic capacitor and method of manufacturing the capacitor |
US6839222B2 (en) * | 2002-12-06 | 2005-01-04 | Matsushita Electric Industrial Co., Ltd. | Electrolytic capacitor |
JP2004193402A (en) | 2002-12-12 | 2004-07-08 | Du Pont Teijin Advanced Paper Kk | Solid electrolytic capacitor |
US6853537B2 (en) * | 2003-03-20 | 2005-02-08 | Jelmax Company, Ltd. | Electrolytic capacitor and a fuel cell drive car using the capacitor |
CN1702788A (en) | 2005-07-05 | 2005-11-30 | 万裕三信电子(东莞)有限公司 | Solid electrolytic capacitor and method for manufacturing the same |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120250223A1 (en) * | 2009-07-30 | 2012-10-04 | Medtronic, Inc. | Method for joining dissimular separator materials |
US8848340B2 (en) * | 2009-07-30 | 2014-09-30 | Medtronic, Inc. | Method for joining dissimular separator materials |
US20130258554A1 (en) * | 2010-03-16 | 2013-10-03 | Shin-Etsu Polymer Co., Ltd. | Solid electrolytic capacitor, method for producing the same and solution for solid electrolytic capacitor |
US8773843B2 (en) * | 2010-03-16 | 2014-07-08 | Shin-Etsu Polymer Co., Ltd. | Solid electrolytic capacitor, method for producing the same and solution for solid electrolytic capacitor |
US20120250226A1 (en) * | 2010-08-20 | 2012-10-04 | Panasonic Corporation | Sealing member for capacitor and aluminum electrolytic capacitor using the same |
US8432664B2 (en) * | 2010-08-20 | 2013-04-30 | Panasonic Corporation | Sealing member for capacitor and aluminum electrolytic capacitor using the same |
US9875851B2 (en) | 2012-05-08 | 2018-01-23 | Epcos Ag | Ceramic multi-layered capacitor |
Also Published As
Publication number | Publication date |
---|---|
TW200908047A (en) | 2009-02-16 |
KR20080085690A (en) | 2008-09-24 |
CN101271779A (en) | 2008-09-24 |
TWI410990B (en) | 2013-10-01 |
JP2008235424A (en) | 2008-10-02 |
KR100965043B1 (en) | 2010-06-21 |
US20080232034A1 (en) | 2008-09-25 |
JP4448865B2 (en) | 2010-04-14 |
CN101271779B (en) | 2011-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7948740B2 (en) | Solid electrolytic capacitor and method of manufacturing the same | |
EP1096519B1 (en) | Solid electrolytic capacitor and method for manufacturing the same | |
US8462484B2 (en) | Method for manufacturing electrolytic capacitor with electrically conductive solid layer and electrolytic capacitor with electrically conductive solid layer | |
US9153384B2 (en) | Method of manufacturing an electrolytic capacitor | |
JP2010129651A (en) | Method for producing solid electrolytic capacitor | |
TWI397091B (en) | Capacitor and manufacturing method of the same | |
US7106575B2 (en) | Solid electrolytic capacitor | |
JP2008300463A (en) | Solid-state electrolytic capacitor and its manufacturing method | |
JPWO2009113285A1 (en) | Solid electrolytic capacitor and manufacturing method thereof | |
US20110232055A1 (en) | Method of manufacturing electrolytic capacitor | |
CN107112138A (en) | The manufacture method of electrolytic capacitor | |
JP2009289833A (en) | Method for manufacturingcapacitor | |
US8257449B2 (en) | Method for manufacturing niobium solid electrolytic capacitor | |
JP3416637B2 (en) | Solid electrolytic capacitor and method of manufacturing the same | |
JP2007173454A (en) | Solid electrolytic capacitor | |
JP2000138133A (en) | Solid electrolytic capacitor and its manufacture | |
KR102414081B1 (en) | High-voltage aluminum polymer capacitor and method for manufacturing the same | |
JP2007305684A (en) | Solid electrolytic capacitor and method for manufacturing the same | |
JP2001284179A (en) | Solid electrolytic capacitor and method of manufacturing the same | |
JP3856144B2 (en) | Manufacturing method of solid electrolytic capacitor | |
JP2006066639A (en) | Solid electrolytic capacitor | |
JP2002110464A (en) | Solid-state electrolytic capacitor and method of manufacturing the same | |
JP2007311519A (en) | Electrolytic capacitor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FUJITSU MEDIA DEVICES LIMITED, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FUNAHASHI, MINORU;YAMADA, KATSUHARU;REEL/FRAME:020678/0573 Effective date: 20080228 |
|
AS | Assignment |
Owner name: FUJITSU MEDIA DEVICES LIMITED, JAPAN Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE A MISSING INVENTOR PREVIOUSLY RECORDED ON REEL 020678 FRAME 0573. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF ASSIGNOR'S INTEREST.;ASSIGNORS:FUNAHASHI, MINORU;UEDA, AKIRA;YAMADA, KATSUHARU;REEL/FRAME:020960/0890 Effective date: 20080228 Owner name: FUJITSU MEDIA DEVICES LIMITED, JAPAN Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE A MISSING INVENTOR PREVIOUSLY RECORDED ON REEL 020678 FRAME 0573. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF ASSIGNOR'S INTEREST;ASSIGNORS:FUNAHASHI, MINORU;UEDA, AKIRA;YAMADA, KATSUHARU;REEL/FRAME:020960/0890 Effective date: 20080228 |
|
AS | Assignment |
Owner name: NICHICON CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITSU MEDIA DEVICES LIMITED;REEL/FRAME:022505/0920 Effective date: 20090401 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20190524 |